Added flash, apparently in weird cases it works when beep fails

testing/toxic/chat.c

@@ -59,6 +59,7 @@ static void chat_onMessage(ToxWindow* self, int num, uint8_t* msg, uint16_t len)
 
   self->blink = true;
   beep();
+  flash();
 }
 
 static void chat_onNickChange(ToxWindow* self, int num, uint8_t* nick, uint16_t len) {